Transfer Function of a AC servo motor

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Thread Starter

Sameer Gokhale

I am having difficulty generating the transfer function of an AC servo motor in Simulink. Does anyone have a tranfer function in Simulink?
 
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George Younkin

Sameer Gokhale,

I have a document that covers the derivation of the transfer function for dc and ac servo motors. The document can be emailed upon request.

Regards,
George Younkin, P.E.
Life FELLOW-IEEE
Industrial Controls Consulting
A Division of Bull's Eye Research, Inc.
N7614 State Road 149
Fond du Lac, WI 54935-9507
Ph:920-929-6544
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E-mail: [email protected]
 
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Luong Vinh Phu

I'm a student of HCM city university of technology, Viet Nam. I've just seen the news that you have a document that covers the derivation of the transfer function for dc motor.I need some information for my composition, can you send me that document?

Actually, my project is using servo motor to control a three axis machine (milling or drilling machine...). I intend using three microcontroller to control tree axis, one microcontroller for each axis and its receive data from the PC. I've just a last student so that I have not many knownledge here. Can you give me some advice? Thank you very much.

Regards
Phu

P.S. My email: [email protected]
[email protected]
 
hi sameer

my name is hussain and i am an engineering student. i am in the final year.we are making a project on pid controller. we need to interface a motor to the pid as an application. i need the transfer function of the motor. if you can please email me on [email protected]. i will be really obliged.
 
As of today, This thread is over 15 years old, having started in 2005.

A warning to those seeking Mr. Younkin's paper: providing an email address to a 15 year old thread is not likely to get a response. A web search reveals that Mr. Younkin died in 2011.

You might want to try this link:

Link
 
I wonder who George Younkin asked when there wasn't an internet.
I actually have a signed copy of George Younkin's book however, I don't agree with some of the things that are in the book.
There are a lot of calculations and way too much to post on a forum.
I would suggest finding newer sources for newer control techniques.
The first thing I would learn is system identification since manufacturers don't supply the transfer functions for their machines. I have NEVER seen one in over 35+ years of motion control. I have had write my own auto tuning programs to get reasonably accurate transfer functions.

I was actually testing my screen video capture software with the picture in picture. I decided to keep the video because I generate a model and calculate the closed loop and feed forward gains in less than two minutes.
Auto Tuning a Small DC Motor
I have used this to compute the model and gains for 250 HP AC drives too. I just don't have one around in my office.
 
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